87 



Eatio of the Area in each Crop to the Area in all the Cereal and Forage 

 Crops taken Together 



Counties 



Wheat 

 percent 



Oats 

 percent 



Corn 

 percent 



Forage 

 percent 





35.3 



3.9 



32.2 



16.7 



10.2 



5.3 



26.1 

 43.2 

 25.3 



21.5 



Clay 



42.7 



Union 



37.3 



Percentages of Total Area of each County in each Crop 



n .. 1 Wheat 



Counties , 



| percent 



Oats' 

 percent 



Corn 

 percent 



Forage 

 percent 



Totals 



Washington 1 12.6 



Clay 1.0 



Union | 8.6 



6.1 

 2.8 

 1.4 



9.1 



11.7 



6.8 



7.7 

 11.3 

 10,0 



35.5 

 26.8 

 26.8 



Acres in Cereal and Forage Crops in Washington, Clay, and Union Counties 



in 1909 



Wheat 

 Oats . . . 

 Corn. . . 

 Pasture 

 Hay... 



Washington 



45,041 

 21,793 

 33,289 

 19,915 

 7,609 



127,647 



Clay 



3,106 

 8,233 

 35,011 

 17,945 

 16,675 

 "80,970" 



Union 



22.116 



3,563 



17,450 



19,385 



6,251 



68,765 



Total Areas in Acres 





Washington 



Clay 



Union 





356,480 

 264,837 



298,240 

 228,469 



256,000 



Areas under cultivation 



132,084 



Percentage cultivated 



74.3 



76.6 



51.6 



crops on which the chinch-bug can live and breed (26.8 percent in 

 Clay and 35.5 percent in Washington). Union county, on the other 

 hand, differed from Washington in the fact that it had only about two 

 thirds as large a ratio of its area under cultivation (51.6 percent to 

 74.3 percent), two thirds as much of its area in wheat (8.6 percent to 

 12.6 percent), and a little more than one fifth as much in oats (1.4 

 percent to 6.1). Otherwise stated, Washington county had nearly 19 

 percent, and Union county only 10 percent, of their total areas in 

 those crops on which the chinch-bug depends mainly for food in 

 spring. Union county also differs from Washington in its hilly and 

 broken character, the cultivated fields being much more scattered and 

 isolated. 



This brings us to a general consideration of the effects of the kinds 

 and distribution of crops on a chinch-bug infestation as shown in the 

 location and progress of this outbreak. For an investigation of this 

 subject I have brought together the crop data for 1909 and 1910 of 



